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Source Naturals, 5-HTP, 50 mg, 120 Capsules

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In Stock
  • Expiration Date: Nov 2019
  • Shipping Weight: 0.18 lbs (0.08 kg)
  • Product Code: SNS-01702
  • UPC Code: 021078017028
  • Package Quantity: 120 Capsules
  • Dimensions: 2.2 x 2.2 x 3.8 in, 0.15 lbs (0.07 kg)
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Product Overview


  • Dietary Supplement
  • L-5-Hydroxytryptophan
  • Supports Normal Sleep Cycles

5-HTP (L-5-Hydroxytryptophan) is an intermediate in the natural conversion of the essential amino acid, tryptophan, to serotonin. Clinical studies have shown that 5-HTP increases the amount and availability of serotonin produced by the body. Increased brain serotonin levels may produce positive effects on emotional well-being, appetite regulation, melatonin production and maintaining a healthy sleep cycle. Source Naturals 5-HTP is naturally derived from the seeds of the African plant Griffonia simplicifolia.

Suggested Use

1 to 2 capsules once or twice daily with a glass of water. Start with 1 capsule per day, increasing dosage up to 4 capsules daily as needed. Do not exceed the recommended dose.

Other Ingredients

Microcrystalline cellulose, gelatin (capsule), colloidal silicon dioxide, and magnesium stearate


In some people, nausea, headaches, nasal congestion, or constipation may occur. If these symptoms occur, lower the dose, or spread the dose throughout the day. Discontinue use if any of these symptoms persist for more than three days. If you are pregnant, may become pregnant, or breastfeeding, taking prescription medication such as antidepressant SSRI's, MAO inhibitors or sedatives, or if you have heart disease, consult your physician before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 2 Capsules
Servings Per Container: 60
  Amount Per Serving %DV
5-HTP (from Griffonia simplicifolia) 100 mg
†Daily Value not established
iHerb Customer Reviews


Posted by Vizion on Jul 05, 2016

I like Source Naturals. I have high hopes for the purity and effectiveness of this product.

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Think it has improved my sleep.

Posted by TheHeArtsprout on Nov 22, 2011

Too early to say, but I think it has improved my sleep. My sister is less depressive on this, and that's great! :) For myself, I prefer the Holy Basil from New Chapter (it makes me calm and certainly improves my sleep and overall feeling).

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Posted by Reviewer1832789 on Oct 21, 2010

This helps my mood and sleep.

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Great product

Posted by Reviewer3328025 on Aug 09, 2009

This really works to reduce appetite, without the side effects of sleepiness and constipation. An excellent company - their mint-flavored sub-lingual melatonin is the best of its kind.

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Posted by Reviewer3165064 on Feb 01, 2009

my father takes is caz he worries about cancer. it's hard to tell whether it works or not but seems better.

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